Hello Jaya Kumar
Yes they will look for your past records in order to see if you have good credit score.
Also you paid the balance of 2400 last month. So till month you will be under defaulter list. Only thing you can do now is
Go to the bank where you paid 2400 and ask them to update the CIBIL server.
It will take 30 to 60 days (check with bank for the correct no of days) to erase your black mark in CIBIL
Then before applying for new loan (after 60 to 90 days), check your CIBIL score in the following link
You can file a case in consumer court only after you clear your dues and they didnt update the CIBIL record. You can issue a lawyer notice first.